Showing Teen Numbers on a Double Ten Frame

Think about where you have seen this before. Egg cartons of a dozen work similarly. Once you know what full looks like, you only count the extras. This is worth learning because recognizing amounts by sight is faster and less tiring than counting.

Watch for it today, and when you spot it, tell someone what you noticed and how you knew. Ask yourself where else the same idea might be hiding, then go and look.

Here comes a new math idea. Two ten frames side by side show teen numbers beautifully. Fill the whole first frame with ten counters, then start the second one. Fifteen means one full frame and five in the next.

You can see the ten and the extras without counting from one. Practice filling and reading double ten frames until you can name the number at a glance. Instant recognition is faster and steadier than counting.

Try naming amounts fast. Have someone build a teen number on a double ten frame and cover it after two seconds. Can you name it? Recognizing a full frame instantly is the skill worth building here. Try it once with someone beside you, then try it alone.